Glass-molding machine.



No. 743,268. PATENTED NOV. 3, 1903. I. H. GIBSON.

GLASS MOLDING MACHINE.

APPLIOATION FILED JAN. 28,1903. y no MODEL. 2 slums-sum 1.

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PATENTBD NOV. 3, 1903. F. H. GIBSON.

GLASS MOLDING MACHINE.

APPLICATION FILED JAN. 28, 1903.

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UNrTED STATES llatented November 3, 1903.

PATENT OFFICE.

FRANK II. GIBSON, OF BRIDGETON, NEW JERSEY, ASSIGNOR OF ONE-HALF TO ELLISON ELMER, OF BRIDGETON, NEW JERSEY.

GLASS-MOLDING MACHINE.

.EPEGIFIOATION formingpart of Letters Patent No. 743,268, dated November 3, 1903.

Application filed January 28, 1903 Serial No. 140,951. (No model.)

T0 on whom it may concern:

Be it known that I, FRANK H. GIBSON, a citizen of the United States, residing at Bridgeton,Cu mberland county, New Jersey, have invented certain Improvements in Glass-Molding Machines, of which the following is a specification.

My invention relates to that class of molding-presses designed for the purpose of making glass insulators, such articles having a screw-threaded cavity whereby they may be secured in place.

My invention comprises certain improvements in machines of the character forming the subject of my application for patent filed May 7, 1902, Serial No. 106,302.

The improvements embodied in the ma chine forming the subject of my present invention are fully shown in the accompanying drawings, in which-- Figure 1 is a side elevation, partly in sec tion, of a machine made in accordance with my invention. Fig. 2 is a plan view of the same, taken on the line a a, Fig. 1. Fig. 3 is a sectional view illustrating a detail of my invention; and Fig. 4 is a side elevation of a portion of the machine shown in Fig. 1, illustrating a detail of my invention.

The structure forming the subject of my invention is mounted upon a wheeled truck whereby it may be moved to any convenient with a bearing-plate 4, having an annular groove which is adapted to receive a series of balls 5, and on the top of this bearing-plate and free to rotate around the standard is a table 6, carrying the molds 7, within which the insulators are formed, such table being supported by the standard and the balls 5. Mounted above the rotatable table and carried with it is an annular ring 8, supported ble table.

by a series of posts 9, secured to said rotata- This annular ring carries a series of sleeves 10, through which work spindles, carrying the screw-plungers 11, adapted to form the interior of the insulators,which plungers are shown in detail in Fig. 3.

Carried by the standard 2 and secured thereto by any suitable means is a sleeve 12, I which supports a suitable bracket 13, in which is mounted a plunger 14. The sleeve and bracket 12 and 13 also carry the connecting parts for operating the machine. The plunger is guided in the bracket 13, and pivoted to said bracket at 15 is a lever or handle 16. 6 Pivotally mounted at 17 on the bracket 13 is a link 18, which is connected to the lever 16 by means of a link 19. The plunger 14 carries an adjustable collar 20 near the upper end of the same, and to bring this plunger 7o into operative connection with the lever or handle 16 a connecting-rod 21 is employed, pivoted to said collar at 22 and to the link 18 at 23. By pulling down on the lever or handie 16 the plunger 14 will be depressed, and when said plunger is directly over one of the screw-plungers 11, carried by the annular ring 8, and the mcld is in such position that its central openingis directly beneath said screwplunger the latter will be depressed and forced into the molten glass contained within said mold. This mechanism, it will be understood, is substantially similar to mechanism employed inthe machine forming the subject of my pending application.

I find in practice that the upward movement of the lever 16 to return the parts of the operating mechanism to their normal position can be greatly assisted and the work of the operator reduced by providing a weight such as shown at 25 in Fig. 1. I also find in practice that the glass in cooling contracts around the lower end of the spindle of the screw-plunger, which portion forms the petticoat of the insulator and tends to crack and break. For the purpose of preventing this I provide plungers of the character illustrated in Fig. 3, in which the spindle or stem has a certain amount of independent movement with respect to the threaded member, whereby such stem or spindle may be lifted a short distance while the threaded end is in i the glass, and said stem or spindle may thereby be released from the petticoat of the insulator. In this figure, 26 represents the hollow stem or spindle, having a plug 27 fitted in the upper part of the same, such plug having a reduced portion 28 to fit the hollow stem and a head 29 with a squared recess 30. Between the top of the hollow stem and the head of the plug an annular collar 31 is car-- ried, and the plug is secured to the stem or spindle by means of a set-screw 32. At the lower part of the hollow spindle 26 a plug 33 is inserted, being held by a pin 34, said plug having a recess 35, and within this recess the stem 36 of the threaded member 11 for forming the threads in the insulator is inserted. To provide independent movement of the stem or spindle 26 .for a limited extent, the stem of the threaded member is slotted at 37, and a pin 38 is passed through the plug 33 and through this slot. When the threaded member is forced into the molten glass in the mold, such glass is spread in the mold and a portion is drawn around the lower part of the hollow stem or spindle, which is tapered or beveled to form the petticoat of the insulator. To withdraw this portion of the stem so as to prevent cracking or breaking of that part of the insulator, I provide what I term a kicker, which engages the annular collar 31 at the upper part of the plungers and lifts the stem of said plunger the distance of the slot 37 in the stem of the threaded member. This device is constructed and operated in the following manner: A lever or arm 40 is pivoted to a bracket 41, carried by the standard 2, and this lever or arm carries a rear extension 42, having a flattened portion 43. Carried by the sleeve 12 of the standard 2 are the lugs 44, through which is passed a rod 45, resting normally on the flattened portion 43 of the lever 40. This rod is connected to the arm which supports the weight 25 by means of a link 46 and carries at the top a beveled block 47, adj ustably secured in place by means of a set-screw 48. Above this rod and also carried by the sleeve of the standard is a friction-block 49, preferably of wood. When the weight is raised preliminary to pressing the plunger in the glass within the mold, the link 46 carries up the rod 45 until the beveled block 47 at the upper end of the same engages the friction-piece carried by the sleeve, and the frictional contact between these parts is sufficient to hold the rod in the elevated position. The link is slotted at 50 where it is connected to this red, so that when the lever 16 is released and the weight starts to descend the rod will not be immediately disengaged; but when it is as the weight is moving the rodis drawn away from its engagement with the wooden block and falls onto the flattened portion 43 of the lever 40. As the threaded member is in the mold, having been depressed with the stem or spindle, the upper portion of the latter, with its annular collar 31, is immediately above the lever 40, and as the .rod

45 strikes the rear of the same the front part will be lifted, engaging the collar and raising the lower end of the spindle clear of the petticoat of the insulator, the threads formed in the latter having hardened sufficiently to prevent the rising of the screw-plunger until it is turned out by hand. After this has been done the table is turned so as to bring the mold to a position where the screw-plunger can be released and withdrawn from the molded insulator. To release the screw-plunger, the operator employs an ordinary crankhandle 51, having a squared portion to engage the squared opening 30 in the top of the screw-plunger spindle and turns the same until the threaded member has been disengaged from the threads formed in .the glass insulator.

To raise the screw-plunger, I provide the following means: Extending through the table 7 of the machine is a series of rods 53,

(one only of which is shown in Fig. l of the drawings,) and these rods have at the upper end arms 54, engaging the annular rings 31 of the screw plungers, and at the bottom collars 55, to one side of which chains 56 are attached and at the other side stop members 57. The chains pass around pulleys 58 and are connected at their opposite ends to weights 59, which are guided on the rods 60. These rods 53 are always in engagement with the screw-plunger, and when said plungers are depressed and forced into the glass in the mold they will be carried down and the weight 59 will be elevated as they are carried down. As soon, however, as the screw-plunger is released from the glass in the mold after the insulator has been formed the weight will cause the rods 53 to rise until the plungers are clear of the mold and in the position I shown in Fig. 1, the limit of such movement being determined by the stop members 57.

In molding-machines of this character the mold-bases are usually fixed to the rotatable bed in order that they may be positioned directly beneath one of the plungers when the bed is stopped. Thisarrangement, however, provides such a very small clearance to introduce the molten glass into the mold that frequently it is impossible to put in the proper quantity to make the insulator. To overcome this difliculty and to insure that the mold is free and clear to receive the glass, I pivot the base at the point 61 to fixed pins 62, carried by the rotatable bed, and by this means permit movement of the mold with the base away from a point directly beneath the plungers and where it is free to receive the molten glass. In order, however, that the mold and the base may be returned to the proper position directly beneath the plunger, I provide a stop 63 alongside of each base, and against this stop the base will be swung by hand after the glass has been charged, and the mold is then in position to have the insulator pressed.

The stem 2 is preferably hollow, providing means to convey a cooling medium (air) to the molds during the process of manufacturing the insulators.' The inlet-pipe is shown at 65, having a valve 66, and a series of outlet-pipes 67 are shown, each one provided with a suitable valve. 7

Having thus described my invention, I claim and desire to secure by Letters Patent 1. In a glass-molding machine, the combination of the mold, a threaded member arranged to be forced into' said mold, a carrier for said threaded member, to which it is permanently secured against independent rotative movement, with provision for limited vertical movement between said threaded member and its carrier.

2. In a glass-molding machine, the combination of the mold, a threaded member arranged to be forced into said mold, a carrier for said threaded member in which it is permanently held, with provision for free vertical movement betweensaid parts, and means for giving said carrier a slight upward movement independent of the threaded member.

3. In a glass-molding machine, the combination of the mold, a threaded member arranged to be forced into the mold, a carrier for said threaded member in which it is permanently held,with provision for free vertical movement between said parts, a plunger for engaging said carrier to force the threaded memberinto the mold, and means for giv- ,ing said carrier a slight upward movement independent of the threaded member.

4. In a glass-molding machine, the combination of the mold, a threaded member adapted to be forced into said mold, a verticallymovable carrier for said threaded member, with provision for movement between said parts, a guide for said carrier, and a plunger for operating upon said carrier.

5. In a glass-molding machine, the combi nation of the mold, a threaded member adapted to be forced into said mold, a vertically,- movable carrierfor said threaded member, with provision for movement between said parts, a guide for said carrier, a plunger for engaging said carrier to force the threaded member in the mold, and means for moving said carrier independently of the threaded member.

6. In a glass-molding machine, the combination of the mold, a threaded memberadapted to be inserted therein, a carrier for said threaded member, said parts being movable with respect to each other, a plunger for acting upon the carrier to force the threaded member into the mold, and a tripping-lever for moving the carrier independently of the threaded member.

nation of the mold, a threaded member adapted to be inserted therein, a carrier for said threaded member, said parts being movable with respect to each other, a plunger for forcing the threaded member into the mold, a cola collar mounted on the carrier, a trippinglever adapted to engage said collar and move the carrier independently of the threaded member, and means for operating said tripping member.

9. In a glass-molding machine, the combination of the mold, a threaded member adapted to be inserted therein, a carrier for said member, a plunger for depressing said carrier whereby the threaded member may be forced into the mold, means for turning the threaded member to release it from the glass in the mold, and means for lifting the carrier when the threaded member is released.

10. In a glass-molding machine, the combination of the mold, a threaded member adapted to be inserted therein, a carrier for said member, a plunger for depressing said carrier whereby the threaded member may be forced into the mold, a tripping-lever for giving the carrier a partial movement after the glass has been pressed, means forturning the threaded member to release it from the glass in the mold, and means for lifting the carrier when the threaded member is released.

operated means for lifting the carrier when the threaded member is released.

12. In a glass-molding machine, the combination of the mold, a threaded member adapted to be inserted therein, a carrier for said member, a plunger for depressing said carrier whereby the threaded member may be forced into the mold, atripping-lever for giving the carrier a partial movement independently of the threaded member, means for turning the threaded member to release it from the glass in the mold, an automaticallyoperated means for lifting the carrier when the threaded member is released, comprising a vertically-movable rod engaging said car- 'rier and a weight for actuating said rod. 7. In a glass-molding machine, the combi- 13. In a glass-molding machine, the combination of the mold, a threaded member adapted to be inserted therein, a carrier for said threaded member, said carrier being movable depressing the plunger, a tripping-lever for giving the carrier a slight upward movement, means for operating said tripping-lever, and a connection between the plunger-operating lever and said operating means, substantially as described.

14. In a glass-molding machine, the combination of the mold, a threaded member adapted to be inserted therein, a carrier for said threaded member, said carrier being movable with respect to the threaded member, a plunger for acting upon said carrier, a lever for depressing the plunger, a tripping-lever for giving the carrier a slight upward movement, means for operating said tripping-lever, and a connection between the plunger-operating lever and said operating means whereby said tripping-lever will be operated when the plunger-operating lever is released.

15. In a glass-molding machine, the combination of the table, a mold, a horizontallymovable base for the same mounted on the table, a vertically-pivoted connection for the mold carried by the base, and a verticallypivoted connection for the base carried by the table.

16. In a glass-molding machine, the combination of the table, a mold, a horizontallymovable base for the same mounted on the table, a vertically-pivoted connection for the mold carried by the base, a vertically-pivoted connection for the base carried by the table, and a stop for limiting the movement of said base.

17. In a glass-molding machine, the combination of a mold, a pivoted base for the same, and an adjustable stop for limiting the movement of said base.

18. In a glass-molding machine, the combination of the mold, a pivoted base for the same, a pivotal connection for the mold carried by the base, a stop for limiting the movement of said base, and means for adjusting said'stop.

19. In a glass-molding machine, the combination of the two-part mold, a movable base for the same, a pivotal connection for said base, the mold being pivoted to said base, and

an adjustable stop for limiting the movement of said base.

20. In a glass-molding machine, the combination of the rotatable table carrying a series of molds, a series of screw-threaded members adapted to be forced into said molds, vertically-moving carriers supporting said threaded members, a guiding-support for said carriers, means for giving said carriers a slight movement to disengage them from the cooling glass, means for Withdrawing the threaded members from the mold, and automatic means for lifting the carriers.

21. In a glass-molding machine, the combination of the rotatable table carrying a series of molds, a series of screw-threaded members adapted to be forced into said molds, vertically-moving carriers supporting said thread ed members, a guiding-support for said carriers, trip mechanism for giving said carriers a slight movement to disengage them from the cooling glass, means for operating said trip mechanism, means for withdrawing the threaded members from the mold, and automatic means for lifting the carriers after said threaded members have been withdrawn.

22. The combination in a glass-molding m achine, of the mold, a threaded member adapted to be forced into the same, a carrier for said threaded member, a plunger for acting upon said carrier, a lever for operating said plunger, a weighted lever for assisting the return movement of said plunger, a pivoted tripping-lever for acting upon the carrier, means for tripping said lever, and a connection between said means and the operatinglever, whereby the return of the weighted lever will operate said means and cause the tripping-lever to engage the carrier.

23. Thecombinationinaglass-molding machine, of the mold, a threaded member adapted to be forced into the same, a carrier for said threaded member, a plunger for acting upon said carrier, a lever for operating said plunger, a weighted lever for assisting the return movement of said plunger, a collar mounted on said carrier, a pivoted trippinglever for acting upon said collar, means for tripping said lever, and a connection between said means and the plunger-operating lever, the return of the weighted lever operating said means and causing the tripping-lever to engage the collar.

24. The combination in a glass-molding machine, of the mold, a threaded member adapted to be entered into the same, a carrier for said threaded member, a plunger for acting upon said carrier, a lever for operating said plunger, a weighted lever for assisting the movement of said plunger, a tripping-lever for acting upon the carrier, a rod adapted to engage said lever,.a link connecting said rod with the operating-lever, and means for holding said rod momentarily when the operatinglever is depressed, the return of the operating-lever dislodging the rod and causing it to act upon the tripping-lever to engage the carrier.

25. The combination in a glass-molding machine, of the mold, a threaded member adapted to be entered'into the same, a carrier for said threaded member, a plunger for acting upon said carrier, a lever for operating said plunger, a weighted lever for assisting the movement of said plunger, a tripping-lever for acting upon the carrier, a rod adapted to engage said lever, a link connecting said rod with the operating-lever, a block carried by the upper end of said rod, and a frictionpiece carried by the standard and adapted to engage said block momentarily when the operating-lever is depressed, the return of the operating-lever dislodging the rod through the medium of the link and causing it to act upon the tripping-lever to engage the carrier.

26. As a new article of manufacture, a plunger-spindle for glass-molding machines having a threaded member permanently secured to the end of the same, with provision for limited vertical movement between said parts.

27. Asanew article of manufacture, aplungel-spindle for glass-molding machines having a socketed end, a threaded member having a portion fitting said socket and permanently secured to said spindle, said threaded ro member having a slotted portion providing for limited vertical movement between the parts.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

FRANK H. GIBSON.

Witnesses:

PAMOOAST LEWIS, MURRAY 0. Bonus. 

